Apparatus for coiling sheet material



June 20, 1944. VANDER UNDE I I 2,352,042

APPARATUS FOR COILING SHEET MATERIAL Filed March 31, 1941 5She'ets-Sheet l INVENTOR EGBERT VANDER .LINDE ATTORNEY June 20, 1944.

. E. VANDER LINDE APPARATUS FOR COILING SHEET MATERIAL 5 Sheets-Sheet 2Filed March 31 mm m June 20, 1944.

E. VANDER LINDE APPARATUS FOR COILING SHEET MATERIAL Filed March 31,1941 5 Sheets-Sheet 5 h F b NDE INVENTOR ERT VANDERL/ 51M. muw

ATTORNEY E. VANDER LINDE APPARATUS FOR COILING SHEET MATERIAL June 20,1944.

Filed March 31, '1941. 5 Sheets-Sheetfl INVENTOR EGBER BY 7' VANDERL/NDE I'm/3.9% ATTORNEY J1me 1944- E. VANDER LINDE ,352, 2

APPARATUS FOR GOILING SHEET MATERIAL Filed March 31. 1941 5 Sheets-Sheet5 INVENTOR 5 .7 E GBERT IA DE/P L/NDE flu. flfidfi/ ATTORNEY PatentedJune 20, 1944 7 APPARATUS FOR COILING SHEET MATERIAL 3 Y Egbert VanderCleveland, Ohio, assignor to The Yoder Company, Cleveland, Ohio, :1.corporation of Ohio Application M rch 31, 1941, Serial No. 386,072

cleans. (01. 242-72),

This invention relates to an apparatusor-a mechanism for coiling sheetmaterial. The mechanism herein disclosed is adapted to coil or re-coilsheet metal that has been hot or cold rolled. The herein disclosedmechanism includes a drum, on whichthe material is coiled or wound,having one or more collapsible sections movable inwardly, whereby thecoiled material may be readily removed.

One object of the invention is to provide, in

an improved mechanism of this character wherein provision is made forsubstantially simultaneously moving the collapsible sections of the druminto operating position and for clamping the free end of the material tothe drum ready for coiling. Another object of the invention is toprovidean improved collapsible drum for coiling sheehrna terial, inwhich the devices for operating the collapsible sections of the drum andfor gripping of the material to connect it to the drum are connected forsubstantially simultaneous operation but related to move the sectionsinto operating positions in advance of the gripping of the material. i

Another object of the invention is to provide in mechanism of thischaracter, having a collapsible drum, improved fluid operated means formoving the collapsible sections of the drum into operating position andsimultaneously securing the free end of the material to the drum.

Another object of the invention'is to provide in mechanism of thischaracter having a collapsible drum and a device for connecting thematerial thereto, improved means for simultaneously moving thecollapsible sections into operating position and the connecting deviceinto engagement with the material and simultaneously moving the sectionsand connecting device into in-operative positions. v 1 x g A furtherobject of the'invention is to provide an improved mechanism of thischaracter in which th means for operating the collapsible sections ofthe drum and securing the material thereto are positively operated ineither direction. Other objects of the inventionwill beapparent to thoseskilled .in the art towhich my invention relates from -.the "followingdescription taken, in

connection with the accompanying drawings, wherein- Fig. 1 is a plan'view of a mechanism embodying my invention.

Fig. 2 is a side elevation.

Fig.3 is a section on the line 3-3 of Fig. 2.

Figs. 4 and 4a together constitute a sectional view on the line 4-4 ofFig. 1 (enlarged).

Fig. 5 is a' section-on the line 55 of Fig. 4a and showing a'portion ofthe material wound on the drum.

Fig.6 is a view similar to Fig. 5, but showing the drum sections incollapsed position.

Figs. 7 and Bare sections on the line 1-1 and 8- -8, respectively, ofFig. 5.

: Fig. 9 is a fragmentary view on the line 9--9 of Fig. 5. a I

In the drawings, l indicates a base or bed on which is mounted astandard 2 arranged to provide spaced bearings 3, 3, preferably of theantifriction type. Thebearings 3, 3, support a shaft 4, one end' portionof which outwardly of the standard 2, carries a drum, indicated as anentirety at 5. Intermediate the bearings 3, 3, the shaft 4 is providedwith a gear 6, in mesh with a pinion 1', which is drivingly connectedthrough a suitable reducing gear mechanism within a housing 2; to ashaftB, the latter in turn being driven by a suitable motor 9. It) indicatesa magnetic brake operable to stop the motor when current thereto is shut01f. The sheet material A issupplied to the drum'5 for coiling thereonfrom anysuitable source (not shown). The drum 5 is supported above a pitll having a track for .asuitable truck I2, which may be positioned be-.low' the coiled material-A, the truck 12 having an 'elevatable'sectionlZa which is adapted to be raised into engagement with the coil(see Fig. 2) and thereafter, by means'of' a-plunger l3 con- .nected to apiston within a cylinder I4 (the latter in turn being connected with asource of fluid supply under pressure), the coil A maybe moved away fromthe drum 5 for transfer to a platform I5; The truck l2 and means formoving it form .nopart of the'present invention, for which reason moredetails of construction thereof are omitted. The drum- 5 comprises. amain section IE, to which front and rearlheads l1, Ila; are secured bycap screwsiB, .and collapsible sections l9, I9, I 9, Each of the drumsections [9, 19, on its inner wall and adjacent'itsopposite ends andintermediate thereof, is providdwith webs Isa terminating at thatendadjacent to the main section lfiin'alined hollow bosses .20, throughwhich a rod or shaft-.2! extends topivotally support the The drumsection I9 is arranged intermediate walls 29 and inclined slots 39 andits upper end is provided with strips 3|, each related to the adjacentcut away and slot to form a guide having an inclined portion and ahorizontal portion forming therewith slot sections 32, 32a. 33, 33indicate a pair of operating devices mounted in thewalls of the drumsection I9'and engaged by the walls of the slot sections 32, 32a, tomove the drum section I9 outwardly and inwardly. Each of the devices 33comprise a roller 33a arranged to engage the walls of the adjacent slotsections the free ends of the sections I9,;I9, its opposite:

lateral portions being connected to the sections Z by pairs of links 23,by means of ,which thesection I9 is supported on tl'iesections- I9, I9,.but

free to move radially of thedrum 5'. The opposite ends of the drumsection I9 slidably fit radially disposed recesses II formediin' theheads'I'I, I'Ia (see Fig. 8). The side walls of the drum section I9 areinclined downwardly and outwardly and serve as cams for engagement withthe free ends of the sections I9, I9, so that when the section I9 ismoved outwardly radially, by the mechanism hereinafter referred to, itswings the sections I9, I9, outwardly, whereby the sections I9, I9, I9,are positioned to form with the main section I 6 a cylindrical wall (seeFig. 5) on which the material may be coiled. In the movement of the drumsection I9 inwardly, it operates through the links 23 to swing thesections I 9 into their collapsed position.

24 indicates a device for securing the free end of the sheet material tothe drum section I6,

mounted thereon and provided with a material engaging member 24a.Asshown in Figs. 5 and 6, the wall of the drum section I3 is formed witha slot or opening ISr which extends from end to end of the drum section,to receive the outer or free end of the material, and the wall of thesection is formed with a recess, in connected relation to the opening16w; the bottom wall of the recess forming an abutment I6a2' in opposedrelation to the material engaging member 24a, so that when the latter isoperated, as later set forth, the material A is clamped or grippedbetween the abutment I6zn' and member 24a. The device 24 comprises arocker preferably. shaped to provide two spaced sleeves 24b rotatablyfitting that rod 2| remote from the abutment like, each sleeve having(a) integral arms 240 preferably integrally connected to the materialengaging member 24a and (b) a separate, operating arm 24d. Each arm 24dis recessed inwardly from. its outer end, as shown at 24d, the wall ofthe recess being threaded to receive a pin 25, the outer end portion ofwhich forms a; shaft fora roller 26. The roller 26 is held 'in positionon the shaft by a nut 26a. The peripheries of the rollers 26 are roundedin cross section for a reason which will later be apparent. The purposeof the arms 24d will later appear. 1

21 indicates as an entirety means for operating the drum sections I 9, I9, I9. and device 24. 'Of the means 21, 28 indicates a sleeve slidablyfitting the shaft 4 within the drum 5 for movement thereon in oppositedirections by a fluid operated means, indicated as an entirety at 28'.The sleeve 28 is provided on its upper side with a radially extendingwall 28a arranged to project into a recess 28a formed in the drumsection I9. As shown in Figs. 4a, 5 and 6, the recess 28a permits thedrum section I9 to move upwardly and downwardly relative to the wall 28afor reasons later apparent. The wall 280,, adjacent its opposite ends iscut away to form horizontal -32,'32 1,-and oppositely extending shafts33b rotatably fitting openings 330 formed in the side portions of thedrum section I9. As the devices 33'are, supported on the drum sectionI9, it will be seen that when the sleeve 28 is moved toward the right,as viewed in Fig. 4a, the drum section l9'swill be moved outwardly andit in turn will swing the sections I9, I9, outwardly; and when thesleeve 28 is moved in the opposite direction,

the drum section I9 will be moved inwardly and it in turn through thelinks 23 will swing the sections I9 inwardly. The sleeve 28 is alsoprovided with a laterally extending wall 34 formed with elongated slots35 (one being shown in Fig. 9) inclined to the axis of the drum 5 toform cams for the rollers 26. As shown in Fig. 9, the

adjacent roller 26 engages the walls of the slot, the effect of which,upon movement of the sleeve 28 toward the right as viewed in Fig. 411(downwardly as viewed in Fig. 9), is to operate the rocker 24; thatls,to swing the arm 24d outwardly and the material engaging member 2411, inthe opposite direction. Accordingly, if the free end of 'the'materialA'has been inserted in the opening Him, the member 24a will engage andgrip the material against the abutment I612; and upon movement of thesleeve in the opposite direction, the walls of the slot 35 will operatethe rocker 2 I in the opposite direction to release the material. Fromthe foregoing description it will be seen that the movement of thesleeve 28 in either direction serves to operate the drum sections andthe rocker 24. It will be understood that in the operation of the sleeve28 toward the right, the drum sections are moved into their expandedposition as the rollers 33a reach the upper end of the inclinedslotsections 32 and are maintainedin this position as the rollers-33a 50:move-through the slot sections 3241.

It will be noted that in the movement of the sleeve 28 to effect atranslation of the wall 28a relative to the rollers 33a, the sleeve 28is also, through the engagement of the walls of the guide slots 35 withthe rolls 26, simultaneousl operating the rocker 24 to move the materialengaging member 24a toward the abutment Ifisc; however, as the slots 35have a predetermined 'relalation, as to length and inclination to theaxis of the drum 5, the material engaging member 24a engages with thematerial A to grip it against the abutment IBx' at or following theentrance of the rollers 33min the slot sections 32a. That is, as therollers 33a traversethe slot sections '32 from the position a to theposition b (Fig. 4a)

to move the drum sections I9, I3, I9, into their -slot s-ections 32a,the rollers 23 move from the position b to the position shown in fulllines (F g. 9), this latter movement ofthe rollers 26 serving to movethe member 24a into clamping engagement with the material. In thisarrangement, the movable drum sections l9, l9, 19', are moved into theirfinal position in advance of thegripping of the material andthereafterthe pressure of the fluid operated means 28 operates to forcethe material engaging member 24a into engagement with the material A tothus secure the latter against the abutment 161:. In the final movementof the rocker 24, it is directly connected to the fluid operating means28'. This arrangement and operation permits the material engaging member24a to readily and effectively clamp material of different thicknessesagainst the. abutment 16w so that the provision of adjustable devicesfor the member 24a or between the sleeve 28 and rocker 24, withincertain limits as to the thicknesses of the material, are eliminated.The sleeve 28 is provided on that side opposite to the wall 34 with aflange 34a arranged to engage a portion of the main drum section 16 (forexample, an upwardly extending wall Hi") to resist any torque efiect onthe sleeve 28 due to the co-action between the rollers 28 and side wallsof the guideslots 35 in the movement of the member 24a to secure thematerial to the abutment Him.

The fluid operated means 28 is arranged, as later setforth, to move thesleeve 28 inwardly, so that in such movement, the material engagementmember 24a is positively disengaged from the material A in advance ofthe movement of the drum sections l9, l9, l9, inwardly, since therollers 33a must traverse the slot sections 32a before they enter and,traverse the slot sections 32. opening 411 in the shaft 4 and servingas an operating connection between the piston 38 of the fluid operatingmeans 28' and the sleeve 28. At its outer end, the rod 31 is providedwith screw threads threaded into a head 31a, the outer portion of theshaft opening 4a being enlarged to accommodate the head; and the head31a in turn is provided with a diametrically disposed pin 39 theopposite ends of which extend through diametrically related, elongatedslots 40 formed in the shaft 4 and flt into recesses 48a formed in thesleeve28 so as to connect the rod 31 to the sleeve. The slots-49 areelongated to permit movement of the pin 39 by the rod 31 in eitherdirection to operate the sleeve 28. By threading the head 311; on theouter end of the rod 31, the rod may be rotated, the effect of which isto adjust the head endwise of the rod, such adjustment through the pin39 and sleeve 28 serving to adjust the slot sections 32 relative to therollers 33 and slots 35 relative to the rollers 28. As shown in Fig. 4,the 'rod 31 extends beyond the inner end of the shaft 4 for connectionwith the piston 38, which reciprocates within a cylinder 38'. Thecylinder 38' consists of a side wall 38a and inner and outer heads 38b,380, the inner head 38bbeing rigidly connected by a collar 4| (throughwhich the rod 31 extends) to the inner end of the shaft 4, whereby thelatter rotates the cylinder. The outer cylinder head 380 is suitablybolted to the outer end of the cylinder side wall 38a and formed with anopening, which is axially related to the shaft 4 and forms the seat forthe inner flanged end of a conduit member 42. The member 42 extendsoutwardly from the head 380, a ring nut 42a threaded thereon andtightened against the head 38c serving to secure the member 42 theretofor rotation with the cylinder 38. The conduit member 42 extends intoand through a casing 43 for'rotation therein to provide for the. supply31 indicates a rod extending through the 1 of the fluid, such as oil orair under pressure, to the cylinder 38' and its discharge therefromthrough stationary pipes 44, 44a, dependent upon theposition' of thevalve element of'a valve indicated as an entirety at 45. The pipe 44 isconnected to an opening leading through the side wall of the casing 43into an annular recess 46 formed in its inner wall and connected to oneend of a conduit 460. formed in the conduit member 42, the opposite endof the conduit 46a leading into the outer end of the cylinder 38', sothat when the fluid is supplied from the pipe 44 to the conduit, 460 itwill move the piston 38 inwardly (to the right as viewed in Fig. 4) andthrough the rod 31 operate the sleeve 28 outwardly. The pipe 44a isconnected to an opening leading through the side wall of the casing 43into an annular recess 41 formed in its inner wall and connected to oneend of a conduit 41a formed in the conduit member 42, the opposite endof the conduit 410. being connected to one end of a duct 48 formed inthe cylinder head 38c and side wall 38a of the cylinder 38'. As shown inFig. 4, the opposite end of the duct 48 leads through the cylinder head382), so that when the fluid is supplied from the pipe 44a to theconduit 41a and duct 48, it will move the piston 38 outwardly (to theleft as viewed in Fig. 4) and through the rod 31 move the sleeve 28inwardly.

The valve 45 serves simultaneously to connect either pipe 44, Me, with afluid supply pipe 44' and the other pipe with 'a discharge =pipe 44a,dependent upon the position of the valve element 45a of the valve 45. Asshown in Fig. 4, the valve element 450, is provided with passages 45b,45c and 45d. In the position shown, the passage 45c connects the supplypipe 44' to the pipe 44 and the passage 45b connects the pipe 44a to thedischarge pipe 44a. Upon movement of the valve element 45a bya rod 49 tothe right (as viewed in Fig. 4), the passage 450 will connect the supplypipe 44 to the pipe 44a and passage 4511 will connect the pipe 44 to thedischarge pipe 44a, The end walls of the valve casing are preferablyutilized to limit the movement of the valve element in either directionwith the passages therein in registry withthe pipes in either operatedposition. Accordingly, in either position of the valve element 45a, thefluid will be supplied through one pipe to one side of the piston 38 andthe fluid on the other side thereof will be discharged from the cylinder38' through the other pipe.

The casing 43 is; mounted on the conduit member 42 between a shoulderthereon and the head of a screw 43' threaded into the outer end of theconduit member. The casing 43 consists of a substantially annular sidewall and inner and outer end walls 43a, the side wall being lined withpacking material in which the conduit member 42 rotates.

In operation, the free end of the material A is inserted in the slotlfia: and then fluid is admitted to the outer side of the piston 38, themovement of which toward the right as viewed in Fig. 4 serves to effectan expansion of the drum sections I9, l9, l9 and then a'gripping of thematerial. The motor 9 is then operated to coil the material on the drum5. To remove the coil, the piston 38 is operated in the oppositedirection, to disengage the member 24a from the material and collapsethe drum sections. The truck 12 is then moved on the rails to positionits platformbelow the coiled material. The platform is then raisedintoengagement with the coil, following which the plunger l3 engages thetruck and coil and moves the coil beyond the drum 5. for transfer to theplatform [5.

To those skilled in the art to which my invention relates, many changesin construction. and Widely differing embodiments and applications ofthe invention will suggest themselves without departing from the spiritand scope of the invention. My disclosures and the description hereinare purely illustrative and are not intended to be in any senselimiting.

What I claim is:

1. In apparatus of the class described, the combination with a support,of a shaft thereon, formed with an axial opening extending inwardly fromone end thereof, means for rotating said shaft, a drum on which sheetmaterial is adapted to be coiled drivingly connected to said shaft, saiddrum comprising a plurality of relatively movable sections, one of saidsections having a longitudinally extending opening into which the freeend portion of the material is adapted to be inserted and an abutmentadjacent said opening, a member movably mounted in said drum andarranged to engage the end portion of the material and secure it to saidabutment, said abutment and said member extending substantially from endto end of said opening, a device connected to said member intermediateits ends,

fluid operated means, a rod connected to and operated by said fluidoperated means and extending into the opening in said shaft, operatingelements, one of which slides on said shaft, between said rod andcertain of the drum sections for effecting relative movement of saidsections, and operating connections within said drum between said rodand said device for operating the latter tomove said member intoengagement with the material to secure it to said abutment.

2. In apparatus of the class described, the combination with a support,of a shaft thereon, formed with an axial opening extending inwardly fromone end thereof, means for rotating said shaft, a drum on which sheetmaterial is adapted to be coiled drivingly connected to said shaft, saiddrum having an opening into which the free end portion of the materialis adapted to be inserted and an abutment adjacent said opening, adevice movably mounted in said drum and provided with a member arrangedto engage the material and secure it to said abutment, fluid operatedmeans mounted exteriorly of said drum, a rod connected toand operated bysaid fluid operated means and extending into the opening in said shaft,and operating connections within said drum between said rod and saiddevice for operating the latter into engagement with the material tosecure it to said abutment, said connections comprising a sleeveslidably mounted on said shaft and operatively connected to said deviceand a pin on said rod projecting laterally through said shaft andoperatively connected to said sleeve.

3. In apparatus of the class described, the combination with a support,of a shaft thereon, means for rotating said shaft, a drum on which sheetmaterial is adapted to be coiled, mounted on and drivingly connected tosaid shaft, said shaft being formed with an axial opening extendinginwardly from one end thereof at least to a point within said drum andthe: side wall of said shaft being formed with a slot connected to saidaxial opening, a, longitudinally disposed abutment within andsubstantially co-extensive with said drum, the wall of said drum beingformed with a longitudinally extending opening arranged to permit theinsertion of the free end portion of th material into opposed relationto said abutment, a rocker fulcrumed within said drum,

one arm of said rocker being provided with a member arranged to engagethe material and secure it against said abutment, a sleeve slidablymounted on said shaft within said drum, a rod extending into said shaftand movable endwise bination with a support, of a drum on which sheetmaterial is adapted to be coiled, rotatably mounted on said support,means for rotating said drum, said drum comprising a main section,sections pivoted to the opposite sides of said main section and asection intermediate said pivoted sections arranged to move radiallyoutwardly and inwardly, said intermediate section being connected tosaid pivoted sections to move the latter inwardly and having slidingengagement with said sections to move them outwardly, a member slidablymounted within said drum, connections between said member and saidintermediate section for moving the latter outwardly and inwardly, meansfor operating said member, devices, one of which is movable, on saiddrum for securing the free end portion of the material thereto, andconnections between said member and said movable device for operatingthe latter.

5. In apparatus of the class described, the combination with a support,of a drum on which sheet material is adapted to be coiled, rotatablymounted on said support, means for rotating said drum, said drumcomprising a' main section, sections pivoted to the opposite sides ofsaid main section and a section intermediate said pivoted sectionsarranged to move radially outwardly and inwardly, said intermediatesection being connected to said pivoted sections to move the latterinwardly and having sliding engagement with said sections to move themoutwardly, a member slidably mounted within said drum and provided withinclined and horizontal walls in contiguous relation, devices, one ofwhich is movable, on said drum for securing the free end portion of thematerial thereto, a separate inclined wall on said member arranged tooperatesaid movable device into engagement with the material, an elementmounted on said intermediate section and'arranged to traverse saidinclined and horizontal walls during movement of said member, saidinclined wall serving to move said intermediate section outwardly inadvance of the engagement of said movable device with the material; andmeans for operating said member.

' 6. In apparatus of the class described, the combinationwith a support,of a drum on which sheet material is adapted to be coiled, rotatablymounted on said support, means for rotating said drum, said drumcomprising a main section, sections pivoted to the opposite sides ofsaid main section and a section intermediate said pivoted sectionsarranged to move radially outwardly and inwardly, said intermediatesection being connected to said pivoted sections to move the latterinwardly into collapsed position and having sliding engagement with saidsections to move them outwardly into their expanded position, a memberslidably mounted within said drum, means for operating said member,devices, one of which is movable, on said drum for securing the free endportion of the material thereto, co-acting elements between saidslidable member and said movable device for operating the latter intoengagement with the material, and co -acting devices between said memberand said intermediate section arranged during the initial movement ofsaid member to move said section outwardly into expanded position inadvance of the engagement of said movable device with the material.

7. In apparatus of the class described, the combination with a support,of a sectional drum on which sheet material is adapted to be coiled,rotatably mounted on said support, means for rotating said drum, saiddrum comprising a main section and movable sections certain of which arepivotally mounted on the opposite sides of said main section, to swinginwardly into a collapsed position, said main drum section between itsopposite sides being formed with an inwardly extending opening one sidewall of which forms an abutment, a member mounted to slide within andlongitudinally of said drum, connections between said member and saidmovable sections for swinging them outwardly and inwardly, means foroperating said member, a device swingably mounted on the pivot for oneof said pivoted drum sections, for securing the free end portion of thematerial to said abutment, and connections between said member and saidswingable device for operating the latter.

8. In apparatus of the class described, the combination with a support,of a shaft thereon, means for rotating said shaft, a drum on whichmaterial is adapted to be coiled, drivingly connected to said shaft,said drum comprising a main section, side sections pivotally mounted onsaid main section and a section mounted on said side sections to moveradially of said drum and having sliding engagement with said sidesections to swing them outwardly into expanded position, a memberslidably mounted on said shaft, a movable clamping device within saiddrum arranged to engage the end portion of the material to secure it tosaid main drum section, cam operated devices between said radiallymovable section and said slidable member for operating said section, camoperated devices between said clamping device and said slidable memberfor operating said device, and means extending through said shaft foroperating said slidable member.

9. In apparatus of the class described, the combination with a support,of a drum on which sheet material is adapted to be coiled, rotatablymounted on said support, said drum comprising a main section and aplurality of relatively movable sections one of which is pivotallyconnected to said main section, means connected to said main section forrotating said drum, and means for securing one end portion of thematerial to the drum, said securing means comprising an abutment, amovable member between which and said abutment the end portion of thematerial is adapted to be positioned, pivotally mounted on the pivot forsaid pivoted drum section, and fluid operated means for operating saidmember toward said abutment.

10. In apparatus of the class described, the combination with a support,of a shaft mounted at one end on said support, means for rotating saidshaft, a drum on which sheet metal is adapted to be coiled, mounted onand drivingly connected to the other end of said shaft, said drumcomprising a main section, side sections pivotally mounted on theopposite sides of said main section to swing outwardly and inwardly anda radially movable section between said side sections, a reciprocatablemember movable in a direction endwise of said shaft, means forreciprocating said member, means controlled by the movement of saidmember for operating said pivoted and radially movable sectionsoutwardly and inwardly, said main section being formed with alongitudinally extending opening arranged to receive the free end of thematerial, one wall of said opening serving as an abutment, a grippingelement related to said abutment and arranged to detachably secure thematerial to said abutment, and cam means between said member and saidelement for positively operating the latter into and out of engagementwith the material.

EGBERT VANDER LINDE.

